People comparing switch to PS4 seem to be blinded by bias or wishful thinking. i want to see a game on switch where it comes remotely close to red dead redemption, tlou2, horizon, or even the order 1886. There isn't, nothing is even close.
Compare the best looking switch games to TLoU and uncharted 3 and the difference isn't that big. Switch is definitely stronger than a PS3, but let's not kid ourselves and think its on the PS4 or xbox one level.
The witcher 3 argument is rather invalid. It looks like trash on switch, and its not even in the top 20 best looking games on PS4.
Dont take the best looking switch games and compare them to mediocre PS4 games, and say they are on almost on the same level while ignoring the huge difference in resolution and sometimes even framerate. Its like saying PS4 and PS3 are on the same level because PS3 can run battlefield 4 but on a lower res, lower textures and shittier framerate, but hey, it can still run it.
No one saying that Switch is on pair with XB1/PS4, just are people saying that Switch isnt on PS3 level also.
Look for instance at Luigis Mansion 3 or Mario Kart 8 Deluxe with locked frame rate, both run at 1080p and both could easily pass like PS4 games, while on PS3 most impresive games are 720p with not good frame rate.
But if you really want to see comparison between PS3 and Switch, than simple compare same games that are on PS3 and Switch, games like Alien Isolation, Crysis 1-3, Skyrim, Darksiders 1, Red Faction Guerrilla, Dragons's Dogma, Burnout Paradise, Resident Evil, Diablo, Minecraft and others, where you have situation that all those games runs at higher resolution on Switch, improved graphic and more stable/better frame rate, and you also ahve stuff like Dying Light, which was cancelled for PS3 and 360 for technical limitations and just came out fine on the Switch.